1 import java.util.Properties; 2 3 public class ReadJVM { 4 public static void main(String[] args) { 5 Properties pps = System.getProperties(); 6 pps.list(System.out); 7 } 8 } 1. 2. 3. 4. 5. 6. 7. 8. 结果: 2、随便新建一个配置文件(Test.properties) name=JJ Weight=4444 H...
*/publicclassJVMDetails{publicstaticvoidmain(String[]args){// 获取系统信息(JDK信息、Java虚拟机信息、Java提供商信息、当前计算机用户信息)Properties properties=System.getProperties();// 把系统信息打印一下properties.list(System.out);}} 程序跑起来,部分输出截图示意如下。 场景二:业务开发中,让配置替代硬编...
System.setProperties(p); // display new properties System.getProperties().list(System.out); } } System.setProperties改变了当前运行的应用程序的系统属性,这些改变没有被持久化,也就是说,这个改变不会影响以后的对于系统属性的调用(重启jvm)或者是其他的应用程序。系统属性会在每次重启后被重新初始化。
2.读取本地配置文件test.properties并输出 publicclassProperty {publicstaticvoidmain(String args[]){//System.out.println(new Date());//Properties p=System.getProperties();//p.list(System.out);//print all properties about JVMProperties text=newProperties();try{ text.load(newFileInputStream("E:\...
import java.util.Properties; public class PrintSystemProperties { public static void main(String[] a) { // List all System properties Properties pros = System.getProperties(); pros.list(System.out); // Get a particular System property given its key // Return the property value or null ...
System.getProperties().list(System.out); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. Note how PropertiesTest creates the Properties object, p, which is used as the argument to setProperties: 注意PropertiesTest 是如何创建 Properties 对象 p的。 p 作为参数传递给方法 setProperties: ...
Java documentation for java.lang.System.getProperties(). Property setter documentation: Attempts to set all system properties. Copies all properties from p and discards system properties that are read only and cannot be modified. See #getProperty for a list of such properties. Java documentation for...
Java system properties determine the environment in which the Java programs run. They are like system values or environment variables in IBM i.
Java can help reduce costs, drive innovation, & improve application services; the #1 programming language for IoT, enterprise architecture, and cloud computing.
Properties(Java.util.Properties),该类主要用于读取Java的配置文件,不同的编程语言有自己所支持的配置文件,配置文件中很多变量是经常改变的,为了方便用户的配置,能让用户够脱离程序本身去修改相关的变量设置。就像在Java中,其配置文件常为.properties文件,是以键值对的形式进行参数配置的。